EP4215249A1 - Ensemble de fixation - Google Patents

Ensemble de fixation Download PDF

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Publication number
EP4215249A1
EP4215249A1 EP23152496.8A EP23152496A EP4215249A1 EP 4215249 A1 EP4215249 A1 EP 4215249A1 EP 23152496 A EP23152496 A EP 23152496A EP 4215249 A1 EP4215249 A1 EP 4215249A1
Authority
EP
European Patent Office
Prior art keywords
attachment
attachment plate
axis
assembly according
connecting arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23152496.8A
Other languages
German (de)
English (en)
Inventor
Tom Benjamin Phillips
Dougie Swanson-Low
Christopher Sidney Cowell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Excalibur Wales Ltd
Original Assignee
Excalibur Wales Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Excalibur Wales Ltd filed Critical Excalibur Wales Ltd
Publication of EP4215249A1 publication Critical patent/EP4215249A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/0006—Harnesses; Accessories therefor
    • A62B35/0025—Details and accessories
    • A62B35/0037—Attachments for lifelines and lanyards
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/0006—Harnesses; Accessories therefor
    • A62B35/0025—Details and accessories

Definitions

  • This invention relates to an attachment assembly.
  • an attachment assembly that includes a connecting device or connecting sub-assembly and an attachment plate, which attachment plate can be connected to multiple load-bearing components. It has particular application where the connecting device or sub-assembly has a preferred axis of loading.
  • a widely-used type of harness used by arborists incorporates a flexible load-bearing member 2 commonly referred to as a "rope bridge" that extends between two forward connection arrangements 4.
  • the rope bridge serves as a primary component that transfers load from the harness into a rigging system through one or more connecting lines. It is usual to provide a metal connecting component on the rope bridge that can be connected to the rigging system for example through a carabiner.
  • the connecting component can be a metal ring 6, which is advantageous because it can rotate on the rope bridge, so distributing wear evenly around the ring.
  • connection assembly that includes a connecting plate having multiple through holes to which connections can be made.
  • all of these have known assemblies have various disadvantages that can result in uneven wear, twisting of the connection assembly as a result of asymmetric loading, and difficulty in connecting to the harness.
  • An aim of this invention is to provide an improved connection assembly that allows multiple connections to be made through a functional component or sub-assembly to an external anchorage such as the rope bridge of a harness.
  • an attachment assembly comprising:
  • Allowing the attachment plate to pivot with respect to the connecting arrangement in this way allows the attachment plate to adapt its alignment to compensate for asymmetric loads connected to the attachment plate to ensure that the connecting arrangement is loaded, as nearly as possible, along its loading axis and that loading off the loading axis is minimised.
  • the connecting arrangement is capable of withstanding loads that are off-axis from the loading axis, but it is strongest when loads are applied to it as close as possible to the loading axis.
  • the attachment plate axis intersects the loading axis.
  • the connecting arrangement may include a swivel that comprises first and second bosses interconnected for rotation about a swivel axis, the swivel axis being the loading axis of the connection arrangement, and the attachment plate being connected to the second boss such that the attachment plate can pivot with respect to the second boss about the attachment plate axis. It is preferable to avoid off-axis loading of the swivel since this can cause increased wear and friction in the swivel.
  • the connecting assembly may be rigidly attached to the first boss of the swivel or, alternatively, the connecting assembly can pivot with respect to the first boss of the swivel, typically about an axis that is normal to the swivel axis.
  • the connecting arrangement may include a continuous loop or an openable loop which may be in the form of a carabiner body, the loading axis extending through a rope basket of the carabiner body. Off-axis loading of the carabiner body is preferably to be avoided because the carabiner achieves its maximum strength only when loaded on the loading axis.
  • the connecting assembly is typically suitable for connection with a rope bridge of a harness whereby load can be transferred from the harness through the attachment assembly to one or more external components connected to the attachment plate.
  • the connecting assembly may include a pulley block that has a sheave carried for rotation about a sheave axis within a pulley body.
  • a connecting assembly can travel along the rope bridge with minimal friction and even distribution of wear.
  • the connecting assembly includes a continuous loop or an openable loop
  • the loop may be suitable for surrounding the rope bridge of a harness.
  • the attachment plate typically includes a planar region through with the or each attachment aperture is formed and a yoke region by which it is connected to the second boss of the swivel.
  • the attachment plate may include several planar regions each having one or more attachment aperture.
  • this invention provides a harness that includes a flexible load-bearing member that extends between two forward connection arrangements and an attachment assembly that embodies the first aspect of the invention carried on the flexible connecting member.
  • this invention provides safety apparatus comprising a harness embodying the second aspect of the invention and a rigging system, in which one or more components of the rigging system are connected to the attachment plate.
  • Safety apparatus embodying this aspect of the invention may include a main working line which is under tension during normal use, and a backup safety line that is under significant tension only upon failure of the main working line. These lines could both be connected to the attachment plate. In the event that the main working line fails there will be a sudden shock load as the tension transfers across to the safety backup line.
  • the benefits of the attachment plate will pivot to dynamically adjusting its position to re-align with the preferred loading axis. This is particularly important where high peak loads occur.
  • Safety apparatus embodying this aspect of the invention may include two separate and spaced anchors connected to the attachment plate. These anchors enable an arborist to position themselves accurately beneath or between the anchors when it is not possible to find a suitable anchor directly above. This requires the arborist to continuously adjust the tension in both positioning systems as they move. There is a benefit to eliminate bending fatigue on the components by allowing the attachment plate (which the positioning systems are attached to) to dynamically adjust to equalise the load vectors from both anchors.
  • connection assembly embodying the invention comprises three sub-assemblies: a pulley block 10, a swivel 12 and an attachment plate 14.
  • the pulley block 10, which constitutes a connecting assembly in this embodiment includes a sheave 20 carried on an axle 22 between two plates 24, 26 that constitute a pulley body.
  • the sheave 20 is free to rotate on the axle 22 about a sheave axis A Sh .
  • the swivel 12 in this embodiment is constructed in accordance with the disclosure of EP-A-3 088 769 , the content of which is incorporated herein by reference. This is advantageous because such swivels have an advantageously compact structure, but other forms of swivel could be used instead.
  • the swivel 12 includes interconnected first and second bosses 30, 32.
  • the bosses 30, 32 are mechanically interconnected such that they are free to rotate with respect to one another about a swivel axis A Sw . which constitutes a loading axis of the connection assembly.
  • the first boss 30 is connected to the pulley block 10, a portion of the first boss 30 extending between the plates 24, 26 where it is retained by a retaining bolt that is held in place by a machine screw.
  • the retaining bolt has a head 34 that is not round in cross-section (rounded triangular in this example) and is received within a correspondingly shaped, close-fitting recess in the second plate 26 whereby its rotation is prevented.
  • the machine screw has a shaft that is threaded into a tapped axial bore of the retaining bolt and a head 36 that is received into a recess in the first plate 24.
  • the pulley block 10 and the swivel 12 can be separated by the user, so the head 36 of the retaining bolt is formed with a recess for cooperation with a standard tool, such as an Allen key.
  • the plates 24, 26 and the first boss 30 are shaped with co-operating formations, shown generally at 28 that prevent rotation of the plates 24, 26 with respect to the first boss 30 about the retaining bolt.
  • the co-operating formations are flats that extend perpendicular to the swivel axis A Sw .
  • the second boss 32 has outwardly-directed flat bearing surfaces 40 and an axle bolt hole that extends through the second boss perpendicular to the bearing surfaces 40.
  • the attachment plate 14 has a planar region 44 and a yoke region 46.
  • the yoke region 46 has a U-shaped cross-section with two legs that have spaced, mutually-facing, parallel bearing surfaces that are spaced apart by a distance just greater than the spacing of the bearing surfaces 40 of the second boss 32.
  • An axle bolt hole extends through the yoke region 42 perpendicular to the bearing surfaces.
  • the planar region 44 has a plurality of attachment holes 48 formed through it. In this example, there are three holes disposed symmetrically on the planar region 44 and each hole is circular. However, a lesser or greater number of attachment holes 48 may be provided and they may vary in shape.
  • the attachment plate 14 is connected to the second boss by an axle bolt that passes through the axle bolt holes in the second boss and the yoke region 46 such that the bearing surfaces of the second boss and the yoke region 46 lie closely adjacent to one another.
  • the axle bolt has a head 50 that is not round in cross-section (rounded triangular in this example) and is received within a correspondingly shaped, close-fitting recess one leg of the yoke region 46 whereby its rotation with respect to the attachment plate is prevented.
  • the machine screw has a shaft that is threaded into a tapped axial bore of the retaining bolt and a head 52 that is received into a recess in the other leg of the yoke region 46.
  • the axle bolt can rotate within the axle bolt hole of the second boss 32 so allowing the attachment plate to rotate on the second boss about an attachment plate axis A P between limits imposed by parts of the attachment plate 14 making contact with the second boss 32. This combined with the rotation permitted by the swivel 12 about the swivel axis A Sw allows the attachment plate 14 two rotate with respect to the pulley block 10 about two perpendicular axes.
  • the attachment plate 14 has been rotated about the swivel axis A Sw such that its planar region 44 is offset at an angle from the sheave 20. In installations in which multiple lines are connected to the attachment holes 48 this can prevent the lines from becoming twisted or enable them to be untwisted.
  • the attachment plate 14 has been rotated about the attachment plate axis A P .
  • the attachment plate is being loaded asymmetrically by a load L from a connector such as a carabiner 56 that is passed through one of its attachment holes 48, the load L being transferred through the attachment assembly to the rope bridge 2, which is under tension.
  • the attachment plate 15 has been rotated about the attachment plate axis A P such that the load L approaches the alignment of the swivel axis A Sw so reducing the tendency of the connection assembly to become twisted out of alignment.
  • the rope bridge 2 When assembled upon a harness, the rope bridge 2 passes through the pulley block 12 between the sheave 20 and the first boss 30.
  • the attachment assembly can be assembled onto the harness in two ways:
  • the co-operating formations 28 that prevent rotation of the plates 24, 26 with respect to the first boss 30 about the retaining bolt are omitted or modified such that the connecting assembly 10 can pivot with respect to the first boss about the retaining bolt.
  • Figure 7 shows an embodiment in which the connecting assembly 10 is constituted by a C-shaped body 60 on which is carried an openable gate 62 - that is to say, it takes the form of a carabiner.
  • a threaded recess is formed in the body 60 into which the first boss 30 of the swivel (which in this embodiment is externally threaded) is received.
  • the loading axis A L is coincident with the swivel axis and passes through a rope basket of the carabiner.
  • the attachment plate 14 is secured to the second boss 32 of the swivel 12 by an axle bolt about which it can pivot. This helps to reduce any tendency for the carabiner to be incorrectly loaded. For example, when the connecting assembly 10 is attached to a rope bridge 2, the bridge 2 tends to remain in the basket of the carabiner body 60 rather than being displaced sideways towards the gate 62.
  • FIG. 8 A simplified embodiment is shown in Figure 8 .
  • the attachment plate 14 is secured directly to the connecting assembly 10 without the intermediary of a swivel.
  • the connecting assembly 10 is constituted by a C-shaped body 60 on which is carried an openable gate 62 to take the form of a carabiner.
  • the attachment plate 14 will pivot in response to forces applied to it to resist any tendency for a rope that is passing through the body to be displaced from the rope basket and to ensure that the body 60 is loaded close to the loading axis A L .
  • This direct connection can be employed in embodiments that have alternative forms of connecting assembly.
  • the attachment plate includes three planar regions 44', 44", 44′′′ each having three circular attachment apertures and connected to a common yoke region 42.
  • the attachment plate includes one planar region 44 iv that has a single attachment aperture 38' in the form of an arcuate slot.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
EP23152496.8A 2022-01-24 2023-01-19 Ensemble de fixation Pending EP4215249A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2200877.5A GB2614909A (en) 2022-01-24 2022-01-24 Attachment assembly

Publications (1)

Publication Number Publication Date
EP4215249A1 true EP4215249A1 (fr) 2023-07-26

Family

ID=80568395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23152496.8A Pending EP4215249A1 (fr) 2022-01-24 2023-01-19 Ensemble de fixation

Country Status (2)

Country Link
EP (1) EP4215249A1 (fr)
GB (1) GB2614909A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482264A (en) * 1982-04-30 1984-11-13 Kabushiki-Kaisha Kodera Seisakusho Universal joint for fishing lines
EP3088769A1 (fr) 2015-05-01 2016-11-02 Treemagineers Ltd Ensembles pivotants
EP3512609B1 (fr) * 2016-09-14 2020-07-08 Carrs Billington Agriculture (Sales) Ltd Raccord de harnais et harnais
US10781848B2 (en) * 2016-11-22 2020-09-22 Treemagineers Ltd. Devices formed of interconnected components
EP4050240A1 (fr) * 2021-02-26 2022-08-31 Treemagineers Ltd Poulie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447344A1 (fr) * 1979-01-25 1980-08-22 Stas Soc Tech Access Spec Crochet de securite
GB2541905B (en) * 2015-09-02 2018-05-16 Treeemagineers Ltd Harnesses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482264A (en) * 1982-04-30 1984-11-13 Kabushiki-Kaisha Kodera Seisakusho Universal joint for fishing lines
EP3088769A1 (fr) 2015-05-01 2016-11-02 Treemagineers Ltd Ensembles pivotants
EP3512609B1 (fr) * 2016-09-14 2020-07-08 Carrs Billington Agriculture (Sales) Ltd Raccord de harnais et harnais
US10781848B2 (en) * 2016-11-22 2020-09-22 Treemagineers Ltd. Devices formed of interconnected components
EP4050240A1 (fr) * 2021-02-26 2022-08-31 Treemagineers Ltd Poulie

Also Published As

Publication number Publication date
GB2614909A (en) 2023-07-26
GB202200877D0 (en) 2022-03-09

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